"What color is that blouse?"
Not to nitpick, but "bluzka" means "sweatshirt", and "blouse" means "koszula damska z guzikami". A false friend.
Another one is "dres". When I first got to Poland, some of my students told me to be careful of men who are wearing dresses, because they will beat me up. I thought it was weird that Poland was being terrorized by gangs of aggressive transvestites.